CN105064953B - With the fast degradation bridging plug for promoting degraded central tube - Google Patents
With the fast degradation bridging plug for promoting degraded central tube Download PDFInfo
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- CN105064953B CN105064953B CN201510428926.5A CN201510428926A CN105064953B CN 105064953 B CN105064953 B CN 105064953B CN 201510428926 A CN201510428926 A CN 201510428926A CN 105064953 B CN105064953 B CN 105064953B
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Abstract
The invention discloses with the fast degradation bridging plug for promoting degraded central tube, including central tube, first slip spider, first slips, first cone, packing element, second cone, second slips, second slip spider, pilot seal head, pushing cylinder set, pull bar and briquetting, wherein, central tube includes center tube body, catalyst cylinder and plug, with first slip spider, first cone, second cone, second slip spider and pilot seal head are processed using degradation material, the decomposition of catalyst accelerated degradation material in catalyst cylinder, bridging plug is made using degradation material in this, bridging plug is accelerated to degrade by the accelerated decomposition effect of catalyst, it is rational in infrastructure, meet in oil, degradation speed in the environment of low temperature or low salinity water, fill in or salvage without boring before going into operation, improve operating efficiency.
Description
Technical field
The present invention relates to the downhole tool technical field of oil-gas field development application, and in particular to a kind of degradable bridging plug.
Background technology
In formation testing sealing, card layer or fracturing process, it is often necessary to realized using bridging plug to perforation or pressure break well section
Closure.The bridging plug majority used at present is can to bore or salvagable, after pressing crack construction, it is necessary to using oil pipe band downhole tool,
Enter to bore mill to bridging plug or salvage, to discharge the oil reservoir of closure, but during field conduct, often bored because of casing deformation
Mill or the situation for salvaging failure, a kind of degradable bridging plug of research is needed for this, but current degradable metal material is deposited
It is slow in the high dissolving of intensity, dissolve the degradable metal material of fast low intensity problem, particularly high intensity, oil, low temperature or
In the environment of person's low salinity water, degradation speed can not meet requirement.
The content of the invention
Solved it is an object of the invention to provide one kind after conventional bridging plug sealing, bridging plug bore before operation mill or
The difficulty of salvaging so that after pressure break Oil/gas Well can not quickly go into operation problem have promote degraded central tube fast degradation bridge
Plug.
In order to solve the above-mentioned technical problem, technical scheme is as follows：
A kind of degradable bridging plug, including central tube, the first slip spider, the first slips, the first cone, packing element, the second cone,
Second slips, the second slip spider, pilot seal head, pushing cylinder set, pull bar and briquetting, wherein：
The central tube includes center tube body, is loaded with the catalyst cylinder and plug of catalyst, the center tube body
A blind hole is axially formed along body in the middle part of right-hand member, the catalyst cylinder is arranged in the blind hole, and the plug is arranged on institute
Center tube body right-hand member end is stated to close the blind hole, a through hole has been axially formed centrally along body in the plug,
First annular step is formed with the outer wall of the center tube body left end end, is formed with the right side of the first annular step
Second ring step, makes to be formed with annular groove between the first annular step and second ring-shaped step, first ring
Interior chamfering is formed with the right side of shape step and is along the circumferential direction caved inward at the knuckle of the interior chamfering and is formed with one
Circumferential separation groove；
First slip spider, the first slips, the first cone, packing element, the second cone, the second slips and the second slip spider according to
Secondary right-to-left is sleeved on the center tube body, and first slip spider is press-fitted to the second ring-shaped step right side
On, the pilot seal headgear fills and is fixed on the center tube body right-hand member end；
The pull bar right-hand member is formed with blind hole and is sleeved on the central tube left end, and it is recessed that the briquetting is arranged on the annular
In groove, the pull bar blind hole port inwall extends the 3rd annular table for being formed with and coordinating with the briquetting right side to center
Rank, the pushing cylinder set is sleeved on the pull bar outer wall, and the pushing cylinder covers right-hand member inner wall of end and is formed with the 4th to center extension
Ring-shaped step, the fourth annular step right side is press-fitted on the left side of first slip spider.
Further, the external diameter of the annular groove of the center tube body is less than the external diameter of center tube body.
Further, the internal thread phase with pilot seal head is formed with the outer wall of the center tube body right-hand member end
The external screw thread mutually coordinated, the outer wall of the plug, which is formed with the blind bore end inwall with the center tube body, forms internal thread
Mutual cooperation external screw thread.
Further, the catalyst cylinder includes cylinder and closes the top cover of the cylinder, is arranged in catalyst cylinder
Catalyst is at least one of sodium chloride, potassium chloride, acetic acid, formic acid, citric acid, stearic acid, phosphoric acid, hydrochloric acid, sulfuric acid.
Further, the center tube body and plug are made of degradation material, and the degradation material is magnalium
The materials such as alloy, magnesium copper alloy, magnalium nickel alloy, almag, polycaprolactone, polypropylene, PLA, polyglycolic acid, polyethylene
At least one of material, and the strength of materials of the catalyst cylinder is prepared less than the material for preparing the center tube body and the plug
Expect intensity.
Further, first slip spider, the first cone, the second cone, the second slip spider and pilot seal head are by can
Degradable material makes, and degradation material can be at least one of almag, magnesium alloy, magnesium copper alloy, magnalium nickel alloy.
Catalyst cylinder, center tube body, plug, the first slip spider, the first cone, the second cone, are prepared by regulation
The composition of catalyst is to meet in certain temperature, time in the material and regulation catalyst cylinder of two slip spiders and pilot seal head
The interior requirement for completing bridging plug degraded, is normally carried out subsequent construction operation.
Further, the pilot seal head is axially formed one centrally along body and connected with the through hole on the plug
Through hole.
Further, first slips and first slip spider, second slips and second slip spider are equal
It is fixed on by shear pin on central tube.
Further, the left side of first cone and the right side of second cone are an inclined-plane, by upper
Lifting rod makes first slips and second slips left along first cone respectively by the extruding of pilot seal head
End face and the second cone right side are slided, and contact to form setting with internal surface of sleeve pipe.
Further, the packing element is combined by three pieces of small packing elements, and the rubber shore of the small packing element positioned at two ends is hard
Spend for 85~95, the rubber shore hardness positioned at middle small packing element is 65~80, packing element small in ends is born compared with high thrust, in
Between small packing element be more easy to it is setting.
The beneficial effects of the invention are as follows：Bridging plug is made using degradation material in this, is made by the accelerated decomposition of catalyst
It is rational in infrastructure with accelerating bridging plug to degrade, the degradation speed in the environment of oil, low temperature or low salinity water is met, before operation
Without boring plug or salvaging, operating efficiency is improved.
Brief description of the drawings
Fig. 1 is the structural representation with the fast degradation bridging plug for promoting degraded central tube of the present invention；
Fig. 2 is the structural representation with the central tube in the fast degradation bridging plug for promoting degraded central tube of the invention；
Fig. 3 has the catalyst cylinder for the fast degradation bridging plug for promoting degraded central tube respectively 80 for the embodiment of the present invention 1
DEG C and 100 DEG C of degradation speed curves；
Fig. 4 is being urged respectively for the central tube with the fast degradation bridging plug for promoting degraded central tube of the embodiment of the present invention 1
Agent and without the degradation curve under catalysts conditions.
Embodiment
The foregoing invention content of the present invention is described in further detail with reference to embodiment.But should not be by
This scope for being interpreted as above-mentioned theme of the invention is only limitted to following embodiments.Above-mentioned technological thought situation of the invention is not being departed from
Under, according to ordinary skill knowledge and customary means, various replacements and change are made, the scope of the present invention all should be included in
It is interior.
As shown in Fig. 1~2, a kind of degradable bridging plug, including central tube 1, the first slip spider 2, the first slips 3, first
Cone 4, packing element 5, the second cone 6, the second slips 7, the second slip spider 8, pilot seal first 9, pushing cylinder set 11, pull bar 13 and briquetting
12, wherein：
The central tube 1 includes center tube body 104, is loaded with the catalyst cylinder 106 and plug 109 of catalyst, described
A blind hole 105 is axially formed along body in the middle part of the right-hand member of center tube body 104, the catalyst cylinder 106 is arranged on the blind hole
In 105, the plug 109 is arranged on the right-hand member end of center tube body 104 to close the blind hole 105, in the plug
109 have been axially formed a through hole 110 centrally along body, and is formed with the left end end outer wall of center tube body 104
One ring-shaped step 101, the second ring-shaped step 103 is formed with the right side of the first annular step, makes the first annular step
It is formed between 101 and second ring-shaped step 103 outside annular groove 102, the annular groove of the center tube body 104
Footpath, which is less than on the external diameter of center tube body 104, the right side of the first annular step 101, is formed with interior chamfering and described interior
Along the circumferential direction caved inward at the knuckle of chamfering and be formed with a circumferential separation groove 111；
First slip spider 2, the first slips 3, the first cone 4, packing element 5, the second cone 6, the second slips 7 and the second card
Right-to-left is sleeved on the center tube body 104 successively for watt seat 8, first slips 3 and first slip spider 2, institute
State the second slips 7 to be fixed on central tube by shear pin 10 with second slip spider 8, first slip spider 2 is pressed
Fit on the right side of the second ring-shaped step 103, the pilot seal first 9 is set with and is fixed on the center tube body 104
Right-hand member end, the pilot seal first 9 is axially formed one centrally along body and connected with the through hole 110 on the plug 109
Through hole, the right side of the left side of first cone 4 and second cone 6 is an inclined-plane, is made by upper lifting rod
First slips 3 and second slips 7 are by first 9 extruding of the pilot seal respectively along the left side of the first cone 4
Slided with the right side of the second cone 6, contact to form setting with internal surface of sleeve pipe；The packing element 5 combined by three pieces of small packing elements and
Into, and the rubber shore hardness of the small packing element positioned at two ends is 85~95, the rubber shore hardness positioned at middle small packing element exists
Between 65~80；
The right-hand member of pull bar 14 is formed with blind hole and is sleeved on the left end of central tube 1, and the briquetting 12 is arranged on described
In annular groove 102, the blind hole port inwall of pull bar 13 is formed with to center extension to be coordinated with the right side of briquetting 12
The 3rd ring-shaped step, pushing cylinder set 11 is sleeved on the outer wall of pull bar 13, the pushing cylinder cover 11 right-hand member inner wall of end to
Center extension is formed with fourth annular step, and the fourth annular step right side is press-fitted to the left end of first slip spider 2
On face.
Wherein, the internal thread phase with the pilot seal first 9 is formed with the right-hand member end outer wall of center tube body 104
The external screw thread 108 mutually coordinated, the outer wall of the plug 109 is formed with the blind bore end inwall with the center tube body 104
Form internal thread mutual cooperation external screw thread.
In the selection of all parts degradation material：The catalyst cylinder 106 includes cylinder and closes the top of the cylinder
Lid, the catalyst 107 being arranged in catalyst cylinder 106 is sodium chloride, potassium chloride, acetic acid, formic acid, citric acid, stearic acid, phosphorus
At least one of acid, hydrochloric acid, sulfuric acid；The center tube body 104 and the plug 109 are made of degradation material, described
Degradation material is magnesium alloy, magnesium copper alloy, magnalium nickel alloy, almag, polycaprolactone, polypropylene, PLA, poly- second
At least one of materials such as alkyd, polyethylene, and the strength of materials of catalyst cylinder 106 is prepared less than preparing the central tube
The strength of materials of body 104 and the plug 109；First slip spider 2, the first cone 4, the second cone 6, the second slip spider
8 and pilot seal first 9 made by degradation material, degradation material can be almag, magnesium alloy, magnesium copper alloy, magnesium
At least one of alumel.
There is a specific embodiment of the fast degradation bridging plug for promoting degraded central tube for this below：
It is a kind of have promote degraded central tube fast degradation bridging plug include central tube 1, the first slip spider 2, the first slips 3,
First cone 4, packing element 5, the second cone 6, the second slips 7, the second slip spider 8, pilot seal first 9, pushing cylinder set 11, the and of pull bar 13
Briquetting 12, the height of the center tube body 104 is 980mm, and external diameter is 110mm, the right-hand member of the outer wall of center tube body 104
The external screw thread 8 that a length is 85mm is formed with, a length has been axially formed along body in the middle part of the right-hand member of center tube body 104
For 800mm, internal diameter is 35mm blind hole 105, and the catalyst cylinder 6 is arranged in the blind hole 105, the catalyst cylinder 106
Top cover including cylinder and the closing cylinder, the catalyst cylinder 106 is that length is 770mm, and external diameter is 32mm, and internal diameter is
30mm, the plug 109 is that a length is 20mm, and external diameter is 35mm, and it is the square logical of 5 × 5mm that it, which is centrally formed with an internal diameter,
Hole, the hole size of the pilot seal first 9 is consistent and forms connection, and the plug 109 is arranged on the center tube body 104
Be formed with blind hole 105 described in end-enclosed, the blind bore end inwall of center tube body 104 with outside the outer wall of plug 109
The internal thread that screw thread coordinates；
First annular step 101 is formed with the left end outer wall of center tube body 104, in the first annular step
101 right sides are formed with the second ring-shaped step 103, make shape between the first annular step 101 and second ring-shaped step 103
Into there is annular groove 102, the external diameter of the first annular step 101 is 114mm, and the external diameter of second ring-shaped step 103 is
114mm, the external diameter of the annular groove 102 is 95mm, and width is 65mm, in the right side of the first annular step 101 and
The interior chamfering that the left side of second ring-shaped step 103 is each formed with 30 ° makes the section of the annular groove 102 be an inversion
Trapezoidal, (right side of i.e. described first annular step 101 is formed with the bottom surface of annular groove 102 at the interior chamfering
Angle) there are a circumferential separation groove 111 that along the circumferential direction depression is formed downwards, the cup depth of the circumferential separation groove 111
For 1.0mm；
The center tube body 104 and the plug 109 are using the formation of 95wt% magnesium+4.9wt% aluminium+0.1wt% nickel
Alloy material is made, and its strength of materials is 300MPa, and the catalyst cylinder 106 is made of poly-lactic acid material, its strength of materials
For 35MPa；The catalyst 107 contained in catalyst cylinder is 20wt% formic acid+80wt% acetic acid；First cone 4,
First cone seat 2, the second cone 6, the second slip spider 8 and pilot seal first 9 by degradation material using 95wtwt% magnesium+
The alloy material of 4.9wtwt% aluminium+0.1wtwt% nickel formation is made, and its strength of materials is 300MPa.
This has the operation principle for the fast degradation bridging plug for promoting degraded central tube：
The bridging plug is by catalyst 107 in catalyst cylinder 106 by after the degraded of catalyst cylinder 106, and catalyst 107 oozes
At the inwall of Tou Zhi centers tube body 104, the external diameter of the annular groove 102 of the center tube body 104 is less than center tube body
External diameter, shortens the time of penetration of degradation catalyst 107, makes its more easy fracture by the structure of breaking groove 111.At center tube body 104
Breaking groove 111 is broken at first, the catalyst 107 is leaked out at the outer wall of center tube body 104, the pilot seal first 9
Square central through hole is connected with the square balance pipe of the plug of the central tube, catalyst extravasation is accelerated bridging plug degraded；
First slips 3, second slips 7, first slip spider 2 and second slip spider 8 are by cutting
Cut pin 10 to fix, bridging plug is not set during going into the well；
Described that there is the fast degradation bridging plug for promoting degraded central tube to be gone into the well after being connected with setting tool, bridging plug transfers to design
Behind position (now pilot seal first 9 is located at bottom, and pull bar is located at top), under the promotion of setting tool, carry and lead on pull bar
Crossing pull bar pulls briquetting to move up central tube, and pushing cylinder set is then remained stationary as, and tightly withstands the Bu Sui centers of the first slip spider 2
Guan Shangti and move, when pull bar, which is above carried, reaches certain pulling force, the first slip spider 2, the first cone 4, the second cone 6 are fixed before
Cut, carried on central tube with the shear pin 10 of the second slip spider 8, drive pilot seal first 9 to promote lower tile mounting base 8 and cone
6 move up compression packing element 5, and packing element 5 compresses simultaneously, and the first slips 3 and the second slips 7 are respectively along the first cone 4 and second
The inclined-plane of cone 6 is moved out, and slips enlarged outside diameter is set to occlusion formation is contacted with internal surface of sleeve pipe, and now bridging plug is fixed on set
Guan Shang；
After pressure break is finished, bottom hole temperature (BHT) rise, degraded bridging plug starts to decompose in fracturing fluid, until sealing function is lost,
The layer closed by bridging plug starts liquid, it is to avoid bores bridging plug or salvages the process that bridging plug discharges oil reservoir；Wherein, the bridging plug drop
Solution is blocked by making catalyst cylinder 106, center tube body 104, the plug 109, first from different degradable materials
Watt seat 2, the first cone 4, the second cone 6, the second slip spider 8 and pilot seal first 9, it is ensured that under its different temperatures, time conditions
Degradation property；Two be catalytic action accelerator activator cylinder 106, center tube body 104 and the plug 109 by catalyst 107
The decomposition of material；The catalyst cylinder 106 is by the preferential fast decoupled of effect of catalyst 107, and catalyst cylinder 106, which is decomposed, misses
Afterwards, the catalyst 107 is contacted with center tube body 104 and plug 109 makees in briquetting to itself pressure to central tube simultaneously
First be broken fracture groove 111 under, catalyst extravasation makes the accelerated decomposition of center tube body 104, the plug 109 by
The square balance through hole 110 of the center of the plug 109 is in the catalyst action accelerated decomposition, simultaneously because plug
The square balance through hole 110 of 109 center is connected with the square through hole in pilot seal first 9, therefore catalyst 107 is simultaneously
Penetrate into pilot seal first 9 and accelerate its decomposition；
In central tube decomposable process, catalyst progressively outside seepage, and with the upper of bridging plug, the second slip spider and cone etc.
Degradable component contact, promotes degradable part to start decomposition, until packing element loses compression stress and resilience, bridging plug is lost sealing
Effect, the layer closed by bridging plug starts liquid, has subtracted the process bored bridging plug or salvage bridging plug release oil reservoir.
As shown in figure 3, being fast degradation bridging plug central tube in embodiment 1 respectively in the case where there is catalyst environment and without pressure break
Degradation curve figure under pendular ring border, its degradation time (h) in both environments is as shown in table 1 below：
Table 1：
In table 2, curve 1 be catalyst environment lower center tube decompose tendency chart, curve 2 be under fracturing fluid environment in
Heart pipe decomposes tendency chart, and the curve tendency trend from table in data and Fig. 3 can be seen that into the catalyst cylinder equipped with catalyst
Structure design greatly accelerates the decomposition rate of central tube.
Relative in the environment of fracturing fluid and stratum water central tube bulk degradation it is slow, it drops in the environment of catalyst
Speed is solved to accelerate, one is it is fast because preparing the material of the catalyst cylinder degradation speed in fracturing fluid and stratum water environment, secondly
Be prepare catalyst cylinder mechanical strength it is low, be easily broken under certain pressure effect, be catalyst it is logical in urging
Agent is missed, after catalyst is contacted with center tube body and plug, the decomposition of acceleration center tube body and plug, to realize bridging plug
Sealing and the control of degradation time.When in use, central tube is assembled in bridging plug, under to behind shaft bottom, catalyst cylinder is in fracturing fluid
Or in the environment of stratum water, under the double action of high temperature and catalyst, degradation speed is accelerated, because central tube is in pressure break
Decomposition rate is very slow under liquid and stratum water environment, it is ensured that within hour, and its appearance and size does not change, and works as catalyst
During cylinder rupture, the work of bridging plug is completed, and the center tube body and plug that catalyst is made with degradation material are contacted, central tube sheet
Body and plug, which are decomposed, to be accelerated, and starts degraded until all material has been decomposed completely.
Can be with control centre's pipe by intensity, the thickness of material etc. that adjust the composition of catalyst and prepare catalyst cylinder
Decomposition rate and use duration.
The catalysis for the fast degradation bridging plug central tube being illustrated in figure 2 in 100 DEG C of 80 DEG C of downhole temperature and downhole temperature
Agent cylinder degradation speed curve map, its degradation time (h) see the table below 2：
Table 2：
In table 2：Catalyst cylinder decomposes tendency chart when curve 1 is 100 DEG C of down-hole ambient temperature, and curve 2 is subsurface environment
Catalyst cylinder decomposes tendency chart during 80 DEG C of temperature, and the curve tendency trend from table in data and Fig. 2 can be seen that embodiment system
Standby central tube is used in different temperatures underground, and degradation speed is different with degradation time.
Therefore need to consider that underground work temperature is different with selection come the composition for adjusting catalyst when preparing the central tube
Degradation material.
In summary, present disclosure is not limited in the above embodiments, and the knowledgeable people in same area can
Can propose other embodiments easily within the technological guidance's thought of the present invention, but this embodiment is included in this hair
Within the scope of bright.
Claims (10)
1. a kind of have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that including central tube (1), the first slip spider
(2), the first slips (3), the first cone (4), packing element (5), the second cone (6), the second slips (7), the second slip spider (8), lead
To seal head (9), pushing cylinder set (11), pull bar (13) and briquetting (12), wherein：
The central tube (1) includes center tube body (104), is loaded with the catalyst cylinder (106) and plug (109) of catalyst,
A blind hole (105) is axially formed along body in the middle part of center tube body (104) right-hand member, the catalyst cylinder (106) is set
In the blind hole (105), it is described blind to close that the plug (109) is arranged on center tube body (104) the right-hand member end
Hole (105), has been axially formed a through hole (110), in the center tube body in the plug (109) centrally along body
(104) first annular step (101) is formed with the outer wall of left end end, the second ring is formed with the right side of the first annular step
Shape step (103), makes to be formed with annular groove between the first annular step (101) and second ring-shaped step (103)
(102), be formed with the right side of the first annular step (101) interior chamfering and at the knuckle of the interior chamfering circumferentially
Direction, which caves inward, is formed with a circumferential separation groove (111)；
First slip spider (2), the first slips (3), the first cone (4), packing element (5), the second cone (6), the second slips (7)
It is sleeved on the second slip spider (8) successively right-to-left on the center tube body (104), first slip spider 2 is press-fitted to
On second ring-shaped step (103) right side, the pilot seal head (9) is set with and is fixed on the center tube body
(104) right-hand member end；
Pull bar (14) right-hand member is formed with blind hole and is sleeved on the central tube (1) left end, and the briquetting (12) is arranged on institute
State in annular groove (102), pull bar (13) the blind hole port inwall is formed with right with the briquetting (12) to center extension
The 3rd ring-shaped step that end face coordinates, the pushing cylinder set (11) is sleeved on the pull bar (13) outer wall, the pushing cylinder set (11)
Right-hand member inner wall of end is formed with fourth annular step to center extension, and the fourth annular step right side is press-fitted to described first
On the left side of slip spider (2).
2. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that the central tube
The external diameter of the annular groove of body (104) is less than the external diameter of center tube body (104).
3. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that the central tube
The external screw thread cooperated with the internal thread of pilot seal head (9) is formed with the outer wall of body (104) right-hand member end
(108), the outer wall of the plug (109), which is formed with the blind bore end inwall with the center tube body (104), forms interior spiral shell
Line mutual cooperation external screw thread.
4. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that the catalyst
Cylinder (106) includes cylinder and closes the top cover of the cylinder, and the catalyst (107) being arranged in catalyst cylinder (106) is chlorination
At least one of sodium, potassium chloride, acetic acid, formic acid, citric acid, stearic acid, phosphoric acid, hydrochloric acid, sulfuric acid.
5. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that the catalyst
Cylinder (106), center tube body (104) and plug (109) are made of degradation material, and the degradation material is closed for magnalium
In gold, magnesium copper alloy, magnalium nickel alloy, almag, polycaprolactone, polypropylene, PLA, polyglycolic acid, polyethylene at least
One kind, and the strength of materials of catalyst cylinder (106) is prepared less than preparing the center tube body (104) and the plug
(109) the strength of materials.
6. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that first card
Watt seat (2), the first cone (4), the second cone (6), the second slip spider (8) and pilot seal head (9) are made by degradation material,
Degradation material is at least one of almag, magnesium alloy, magnesium copper alloy, magnalium nickel alloy.
7. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that the guiding is close
End socket (9) is axially formed a through hole connected with the through hole (110) on the plug (109) centrally along body.
8. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that first card
Watt (3) pass through shear pin (10) with first slip spider (2), second slips (7) and second slip spider (8)
It is fixed on central tube.
9. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that first cone
The left side of body (4) and the right side of second cone (6) are an inclined-plane, make first slips by upper lifting rod
(3) extruded with second slips (7) by pilot seal head (9) respectively along the first cone (4) left side and institute
The slip of the second cone (6) right side is stated, contacts to form setting with internal surface of sleeve pipe.
10. according to claim 1 have the fast degradation bridging plug for promoting degraded central tube, it is characterised in that the packing element
(5) combined by 3 pieces of small packing elements, and the rubber shore hardness of the small packing element positioned at two ends is 85~95, positioned at the small of centre
The rubber shore hardness of packing element is between 65~80.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510428926.5A CN105064953B (en) | 2015-07-20 | 2015-07-20 | With the fast degradation bridging plug for promoting degraded central tube |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510428926.5A CN105064953B (en) | 2015-07-20 | 2015-07-20 | With the fast degradation bridging plug for promoting degraded central tube |
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| CN105064953B true CN105064953B (en) | 2017-09-05 |
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| CN109899028A (en) * | 2019-04-26 | 2019-06-18 | 天津市玛特瑞科技有限公司 | A kind of solvable bridge plug |
| CN110513075B (en) * | 2019-08-16 | 2022-05-06 | 中国石油天然气集团有限公司 | Soluble bridge plug and soluble device for accelerating dissolution of bridge plug |
| CN110656904A (en) * | 2019-09-11 | 2020-01-07 | 中国石油天然气股份有限公司 | Method for accelerating dissolution rate of soluble bridge plug |
| CN113622866B (en) * | 2020-05-06 | 2023-06-30 | 中国石油天然气股份有限公司 | Controllable full-degradable bridge plug |
| CN111636845A (en) * | 2020-05-25 | 2020-09-08 | 中国石油天然气股份有限公司 | Rapidly degradable sealing structure and application method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103725274A (en) * | 2013-12-27 | 2014-04-16 | 中国石油集团渤海钻探工程有限公司 | High-pressure-resistant controllable degradation chemical molding fluid bridge plug as well as preparation method and application thereof |
| CN203685121U (en) * | 2014-01-10 | 2014-07-02 | 北京玻钢院复合材料有限公司 | High-temperature-resistant high-pressure rapid drillable composite material bridge plug with combined sealing structure |
| CN203925413U (en) * | 2014-03-13 | 2014-11-05 | 吉林市旭峰激光科技有限责任公司 | A kind ofly exempt to bore formula bridging plug based on solvable slips |
| CN203961903U (en) * | 2014-07-09 | 2014-11-26 | 中国石油集团渤海钻探工程有限公司 | Oil-pipe bridge plug |
| CN204113212U (en) * | 2014-10-11 | 2015-01-21 | 中国石油天然气股份有限公司 | Composite bridge plug |
| CN104775788A (en) * | 2014-01-10 | 2015-07-15 | 北京玻钢院复合材料有限公司 | High-temperature and high-pressure resistant quick drillable composite material bridge plug with combined sealing structure |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU687366B2 (en) * | 1993-10-04 | 1998-02-26 | Baker Hughes Incorporated | Method and apparatus for sealing and transferring force in awellbore |
| US7044230B2 (en) * | 2004-01-27 | 2006-05-16 | Halliburton Energy Services, Inc. | Method for removing a tool from a well |
| US7168494B2 (en) * | 2004-03-18 | 2007-01-30 | Halliburton Energy Services, Inc. | Dissolvable downhole tools |
-
2015
- 2015-07-20 CN CN201510428926.5A patent/CN105064953B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103725274A (en) * | 2013-12-27 | 2014-04-16 | 中国石油集团渤海钻探工程有限公司 | High-pressure-resistant controllable degradation chemical molding fluid bridge plug as well as preparation method and application thereof |
| CN203685121U (en) * | 2014-01-10 | 2014-07-02 | 北京玻钢院复合材料有限公司 | High-temperature-resistant high-pressure rapid drillable composite material bridge plug with combined sealing structure |
| CN104775788A (en) * | 2014-01-10 | 2015-07-15 | 北京玻钢院复合材料有限公司 | High-temperature and high-pressure resistant quick drillable composite material bridge plug with combined sealing structure |
| CN203925413U (en) * | 2014-03-13 | 2014-11-05 | 吉林市旭峰激光科技有限责任公司 | A kind ofly exempt to bore formula bridging plug based on solvable slips |
| CN203961903U (en) * | 2014-07-09 | 2014-11-26 | 中国石油集团渤海钻探工程有限公司 | Oil-pipe bridge plug |
| CN204113212U (en) * | 2014-10-11 | 2015-01-21 | 中国石油天然气股份有限公司 | Composite bridge plug |
Non-Patent Citations (1)
| Title |
|---|
| 水平井压裂工艺技术现状及展望;姚展华 等;《石油矿场机械》;20120125(第1期);全文 * |
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Effective date of registration: 20210830 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |